Predetermined-weight-indicating device for scales



Jan. 7, 1930. G. R. WOOD 1,742,229

PRBDETERHINED-WEIGHT INDICATING DEVICE FOR SCALES Filed Aug. 19, 1924 IIIIIIIIIIIIIIIIII/III anmwwoz Patented Jan. 7. 1930 UNITED STATES.

PATENT; OFFICE GEORGE 3. W001), 0E NEW Yo 'k, N. Y., ASSIGNOB. 'ro Eamon SCALE COMPANY, 0E DAYTON, OHIO, A CORPORATION 0E NEW JERSEY PBEDETERMINED-WEIGHT-INDICATING DEVICE FOR SGAL'ES I Application filed August 19, 1924. Serial No. $133,014;

This invention relates to improvements in weighing scales and is particularly directed to the provision of means for displaying a visible indication when the weighing hand 5 or pointer is in a particular position over the weighing chart.

la weighing and mixing commodities oc casion frequently arises where a number of scales are used in a mixing room and it is desirable for a supervisor to be able to determine from a distance whether the operators who are mixing batches of ingredients upon the scales are performing their work in a proper manner. For example, a certain operator may at each operation weigh out two pountls oi" a certain ingredient. After this two pouncl weight of a commodity is weighed. out he removes the commodity from the "weight pan and commences a new weighing operationon another batch of the same commotility. With present scales of the automatic type in order to ascertain Whether an operator is performing an operation proper ly it is necessary for the supervisor to make 28 the weight reaoling observation himself.

This is obviously impracticable where one supervisor is watching the operations ot a number of operators.

The present invention is directed to the provision of a suitable means for establishing an electric circuit to a lamp at the top or at some prominent position on the scale housing whereby this lamp will only light up upon the indicator assuming a particular all at position corresponding to a predetermined loati. Provision is macle for so establishing the circuit to the indicating lamp that the weighing operation is not interfered with.

In the drawings Fl It shows a front view of a scale em boolying my invention.

2 and hare detail views oil the contact "mechanisms Generally the scale may be of any tlesiretl automatic type. I have here illustratecl a scale of type wherein indicator ll) traverses a weight chart ll.

will be under-- stootl that the scale provitlecl the usual automatic counterbelanc" inecht the not at loco. support this or con or not more material to be or too will be free all times straint and the ct o1? mercur ventional form need not be illustrated or describecl. Suitably fixed. in the'scale housing is a block of insulating material 12. This insulating block upon its upper surface is proviclecl with two cupped depressions 13 which form wells adapted to receive mercury. Eatending to these wells are suitable conductors here shown as screws M to which wires 15 are adapted; to be connected. The mercury is filled in these wells so that the meniscus of the mercury surface projects slightly above the top of the fiber bloclr as clearly indicated. at 16 111 Fig. 3. Carried. by the pivotal indicator l0 ancl preferably insulatecl therefrom is a contact member 1'? having a pair of .contact projections or points 18- (see Fig. 2). The wires 15 leaci to a lamp 19 of any desired type mounteol at any tlesirecl point, as for example on the top of the scale housing 20. In aclclition, these wires to also eritencl to a cable 21 which leads to a suitable plug con nection 22 which may he pluggecl in to any proper source of electric current supply,

The operation of the clevice will be seli evident. When the contact points 18 are in contact with the meniscus oi mercury 16, circuit through the l9 is lighted anal the. operator or the supervisor observing at a distance remote from the scale will then know that the indicator 10 a particular position over the chart ii. In l, chart 11 is shown as of the over anal uncle type with zero at the center. "thus the chart may usetl to tell the weighing operator wheth Elli much inaterialis to the suppo It will he understood: that the inoli practically no resist hantl. From me becomes corroc supplied to e mercury wells, necessary t Y suticimt mercu to cause more less I to project above the block lit will be u can be scale housing so as to close the circuit at the desired point in the indicator travel.

What ll claim isv 1. A contact device for a scale adapted to 5 close the circuit of a signal when apredetermined weight is reached, comprising a closed housing, a contact element fixed to the housing in the interior thereof, a member movable Within said housing and having a contact elem ment for engaging said first-named contact element only at a predetermined point of its travel.

2. A contact device for a scale adapted to complete a signal circuit when a predeter- 15 mined Weight is reached, comprising a housing having side and top walls, a contact elernent fixed to one of said side Walls inside the housing,a signal mounted on the top Wall of the housing on the outside thereof, circuit so connections from said contact element to said signal, and a member movably mounted Within said housing and adapted to engage said contact element at a predetermined point of its travel.

3. A contact device for a scale adapted to complete a circuit for a signal or the like When a predetermined Weight is reached, compris ing a closed housing, a pair of contact site rnen'ts fixed to an interior Wall of said housliifi ing, a member movable Within said housing and having a contact for bridging said pair of contact elements to connect said elements in series in the same circuit.

5:. A contact device for a scale adapted to 35 complete a circuit for operating a signal or the like upon a predetermined Weight being reached, comprising closed housing, a pair of contacts fixed to the side of said housing in the interior thereof, a member movable within said housing having a contact eleat upper and adapted to engage said contacts to connect them in series in a circuit, and an electrical device attached to said housing eateriorly thereof adapted to he operated by said circuit.

5. A. device comprising vertically disposed housing, a pair ct contacts lined to avertical Wall or said. housing in the i -Lerior thereot and disposed parallel to said vertical 5? Wall, and contact ineinloer movable "parallel to said Well and inside the housing and 4 adapted to engage said contacts in succession and to bridge sa at one point of its travel or clos an electrical circ a U n 1 w in testimony vvhereoi ll hereto s1gnature GEQRQHE (It 11 E 

